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Finding the Third Proportional to 18.27 and 39.39

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Solution

The third proportional to 18.27 and 39.39 is: 84.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.27 : 39.39 = 39.39 : x
  2. Step 2: Convert to fraction form
    18.27/39.39 = 39.39/x
  3. Step 3: Cross multiply
    18.27x = 39.39 × 39.39
  4. Step 4: Simplify right side
    18.27x = 1,551.78
  5. Step 5: Solve for x
    x = 1,551.78/18.27
  6. Step 6: Final answer
    x = 84.92

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.